公开(公告)号：US20190061404A1

公开(公告)日：2019-02-28

申请号：US16175189

申请日：2018-10-30

Applicant: FUJIFILM Corporation

Inventor： Ryo NAKAMURA ,  Atsushi MATSUURA ,  Tsuyoshi HIROKAWA

IPC: B41N1/08 ,  B41F7/00 ,  B41C1/10

Abstract: The present invention provides a lithographic printing plate precursor that enables a lithographic printing plate formed therefrom to have excellent image visibility and a long press life, as well as a lithographic printing plate manufacturing method and a printing method. The lithographic printing plate precursor of the invention is a lithographic printing plate precursor including an aluminum support and an image recording layer, the aluminum support includes an aluminum plate and an anodized film of aluminum formed on the aluminum plate, the anodized film is positioned closer to the image recording layer than the aluminum plate is, the anodized film has micropores extending in a depth direction of the anodized film from a surface of the anodized film on the image recording layer, the micropores have an average diameter of more than 10 nm but not more than 100 nm at the surface of the anodized film, and the surface of the anodized film on the image recording layer side has a lightness L* of 70 to 100 in a L*a*b* color system.

公开(公告)号：US20190143666A1

公开(公告)日：2019-05-16

申请号：US16245505

申请日：2019-01-11

Applicant: FUJIFILM CORPORATION

Inventor： Ryo NAKAMURA ,  Atsushi MATSUURA ,  Tsuyoshi HIROKAWA

IPC: B41C1/10 ,  B41N1/08 ,  B41N3/03

Abstract: The present invention aims at providing a lithographic printing plate precursor, a lithographic printing plate manufacturing method, a printing method and an aluminum support manufacturing method that enable the resulting lithographic printing plate to have a long tiny dot press life. The lithographic printing plate precursor of the invention is a lithographic printing plate precursor having an aluminum support and an image recording layer disposed above the aluminum support. When measured over a 400 μm×400 μm region of a surface of the aluminum support on the image recording layer side using a three-dimensional non-contact roughness tester, pits with a depth from centerline of at least 0.70 μm are present at a density of at least 3,000 pits/mm2; and a surface area ratio ΔS is not less than 35%, the surface area ratio ΔS being determined using an actual area Sx obtained, through three-point approximation, from three-dimensional data acquired by measurement at 512×512 points in 25 μm square of the surface of the aluminum support on the image recording layer side by means of an atomic force microscope and a geometrically measured area So.